1086859900920 has 128 divisors (see below), whose sum is σ = 3446432352000. Its totient is φ = 273435678720.

The previous prime is 1086859900897. The next prime is 1086859900937. The reversal of 1086859900920 is 290099586801.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 439510 + ... + 1538469.

It is an arithmetic number, because the mean of its divisors is an integer number (26925252750).

Almost surely, 2^{1086859900920} is an apocalyptic number.

1086859900920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1086859900920 is an abundant number, since it is smaller than the sum of its proper divisors (2359572451080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1086859900920 is a wasteful number, since it uses less digits than its factorization.

1086859900920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978253 (or 1978249 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 57.

The spelling of 1086859900920 in words is "one trillion, eighty-six billion, eight hundred fifty-nine million, nine hundred thousand, nine hundred twenty".